CN210894569U - Resonant mutual inductance partial discharge detection device for cable joint - Google Patents
Resonant mutual inductance partial discharge detection device for cable joint Download PDFInfo
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- CN210894569U CN210894569U CN201920262736.4U CN201920262736U CN210894569U CN 210894569 U CN210894569 U CN 210894569U CN 201920262736 U CN201920262736 U CN 201920262736U CN 210894569 U CN210894569 U CN 210894569U
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Abstract
The utility model provides a detection device is put in mutual office of cable joint resonant mode, the device is put collection sensor and office including the office and is put signal processor, still includes the office and puts signal resonance output unit and office and put signal resonance acquisition unit, the office put collection sensor with signal resonance output unit wired connection is put in the office and install in the withstand voltage layer of cable joint sheath, signal resonance output unit is put in the office and signal resonance acquisition unit wireless connection is put in the office, the office is put signal resonance acquisition unit and office and is put signal processor wired connection and install in outside the withstand voltage layer of cable joint sheath. The utility model discloses can put signal wireless transmission to the cable insulation layer with the office outside, less to original cable joint's change, remain the original waterproof withstand voltage technology of cable joint, do not have semiconductor electronic component in the cable joint insulation layer, guarantee that the service life of cable joint insulating layer inner part is greater than the life-span of cable body, safe and reliable.
Description
Technical Field
The utility model relates to a detection area is put in the high tension cable office, concretely relates to detection device is put in the mutual office of resonant mode of cable joint.
Background
The high-voltage cable is used as a blood vessel of a city and provides energy required by city life. Once a cable fails, the impact on city life is immeasurable. The main fault position of the high-voltage circuit is a high-voltage cable connector. The detection of the high-voltage cable connector is well done, which is the key point for ensuring the stable work of the high-voltage cable.
The partial discharge problem of the high-voltage cable is a main factor causing accidents of the high-voltage cable, and has been widely noticed for many years. The cable joint partial discharge generation point is mainly concentrated on the high-voltage cable silicon rubber, if the partial discharge generation point can be positioned at the specific position of a cable joint rubber insulation layer, the fault problem of a cable joint rubber layer is subjected to data analysis, the weak link of the cable joint rubber layer is found out, and the production of products with better qualification rate is facilitated.
The invention patent with the application number of 201710225831.2 of the present company discloses a mesh differential cable joint partial discharge detection device, which comprises a signal detection unit and a signal processing unit, wherein the signal detection unit and the signal processing unit are provided with cable joint positions, and the signal detection unit is a mesh capacitance signal detection unit, namely the signal detection unit is in a mesh structure, adopts multi-piece distributed layout and forms an angle difference; and the signal processing unit processes a plurality of groups of signals transmitted by the signal detection unit by adopting a differential detection principle. The utility model discloses a technical problem that traditional electric capacity can't have less capacitance value when possessing great detection area has effectively been solved to the above-mentioned detection device is put in office, has solved simultaneously and has detected effective office from clutter signal and put the technical problem that takes place the position location, however, above-mentioned utility model's signal processing unit is put sensor installation inside high-pressure joint copper shell by ADC and signal processing singlechip, in view of office, it belongs to cable armor voltage layer, has withstand voltage requirement with earth's zero voltage, therefore can not pull out the signal line that the sensor was put in office and place ADC acquisition chip and signal processing singlechip outside the cable; if the signal processing unit is arranged in the cable, the original cable joint is greatly changed, the service life of the electronic element is not long than that of the cable, and the signal processing unit cannot be maintained after being damaged.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model provides a detection device is put in mutual office of cable joint resonant mode.
The utility model provides a detection device is put in mutual office of cable joint resonant mode, puts acquisition sensor and office including the office and puts signal processor, still puts signal resonance output unit and office including the office and puts signal resonance acquisition unit, the office put acquisition sensor with signal resonance output unit wired connection is put in the office and install in the withstand voltage in situ of cable joint sheath, signal resonance output unit is put in the office and signal resonance acquisition unit wireless connection is put in the office, signal resonance acquisition unit is put in the office and signal processor wired connection is put in the office and install in outside the withstand voltage layer of cable joint sheath.
Preferably, the partial discharge acquisition sensor is a capacitive partial discharge acquisition sensor and is made of a flexible PCB.
In any of the above embodiments, preferably, the capacitive partial discharge collection sensor includes a mesh-shaped capacitance detection area.
In any of the above solutions, preferably, the mesh structure adopted by the capacitor includes a circular mesh structure and/or a polygonal mesh structure, but is not limited to a circular mesh structure and a polygonal mesh structure, and the capacitor also adopts other mesh structures.
In any of the above schemes, preferably, the mesh-shaped capacitance detection area in the capacitive partial discharge acquisition sensor is made of a conductive material.
Preferably, in any of the above aspects, the conductive material comprises copper.
Preferably, in any of the above schemes, the capacitive partial discharge acquisition sensor is internally provided with a plurality of mesh-shaped capacitance detection areas, and the mesh-shaped capacitance detection areas are wrapped outside the cable joint rubber layer and in the copper mesh layer by adopting an array structure and forming an angle difference in a distributed layout.
Preferably, in any of the above schemes, the flexible PCB for manufacturing the capacitive partial discharge acquisition sensor is a double-layer structure, wherein the rubber layer near the cable is a mesh structure, and the copper mesh layer near the cable is an integral one-piece structure.
In any of the above schemes, preferably, the number of the mesh-shaped capacitance detection areas in the capacitive partial discharge acquisition sensor wrapped around a certain cable joint is even, and two detection areas with opposite positions form a group.
Preferably, in any of the above schemes, the partial discharge signal resonance output unit and the partial discharge signal resonance acquisition unit both include a housing, an electromagnetic shielding layer, and a coil layer, and the electromagnetic shielding layer and the coil layer are installed in the housing.
In any of the above schemes, preferably, the coil layer is an inductance coil arranged on the PCB in an array structure.
In any of the above schemes, preferably, the number of sets of inductance coils in the partial discharge signal resonance output unit, the number of sets of inductance coils in the partial discharge signal resonance acquisition unit, and the number of mesh capacitance detection areas in the capacitance type partial discharge acquisition sensor at a certain cable joint are the same.
Preferably, in any of the above schemes, the inductance coil in the partial discharge signal resonance output unit and the capacitance in the capacitive partial discharge acquisition sensor form a resonance circuit.
Preferably, in any of the above schemes, an inductance coil in the partial discharge signal resonance acquisition unit is matched with the capacitor, and a signal transmitted by the partial discharge signal resonance output unit is received through mutual inductance between the inductance coil and an inductance coil in the partial discharge signal resonance output unit.
In any of the above schemes, preferably, the inductance coil is of a double-coil structure, and the magnetic line loop is constrained in a reverse winding manner.
In any of the above schemes, preferably, the electromagnetic shielding layer is made of ferrite material.
Preferably, in any of the above schemes, the partial discharge signal resonance output unit and the partial discharge signal resonance acquisition unit both adopt an integral injection molding structure, and the outer shell of the partial discharge signal resonance output unit and the outer shell of the partial discharge signal resonance acquisition unit both have an IP68 waterproof structure.
In any of the above schemes, preferably, the housing is provided with a wire outlet, and the wire outlet is provided with a rubber plunger for water resistance.
Preferably, in any of the above schemes, the partial discharge signal resonance output unit is installed at the glue pouring port of the cable copper shell and used for transmitting the partial discharge signal to the outside of the pressure-resistant layer of the cable outer sheath.
Preferably, in any of the above schemes, the partial discharge signal resonance acquisition unit is installed outside the pressure-resistant layer of the cable outer sheath and corresponds to the partial discharge signal resonance output unit in position.
Preferably, in any of the above schemes, the partial discharge signal processor collects the detection signal of the capacitive partial discharge collection sensor through the partial discharge signal resonance output unit and the partial discharge signal resonance collection unit.
Preferably, in any of the above schemes, the partial discharge signal processor includes at least one of an FPGA and a single chip microcomputer.
Preferably, in any of the above schemes, the partial discharge signal processor processes the acquired signal to obtain a frequency domain signal strength.
In any of the above schemes, preferably, the partial discharge signal processor processes the signal difference of the grouped capacitors, and positions the position where the partial discharge occurs by distinguishing the signal strength.
Preferably, in any of the above schemes, the partial discharge signal processor uploads the partial discharge occurrence position to the server.
In any of the above schemes, preferably, the connection line between the partial discharge signal resonance acquisition unit and the partial discharge signal processor is an electromagnetic shielding signal line.
The utility model discloses a detection device and detection method are put in mutual inductance office of cable joint resonant mode can put signal wireless transmission to the cable insulation layer with the office outside, can not destroy the withstand voltage requirement of cable armor voltage layer and earth zero voltage, simultaneously because only partial detection device arranges the cable inside, change to original cable joint is less, the original waterproof withstand voltage technology of cable joint has been kept, there is not semiconductor electronic component in the cable joint insulation layer, the life-span of having guaranteed that the operating life of cable joint insulating layer inner part is greater than the cable body, safety and reliability.
Drawings
Fig. 1 is a schematic structural diagram of a resonant mutual inductance partial discharge detection device for a cable joint according to the present invention.
Fig. 2 is a schematic view of a tiling of a preferred embodiment of the resonant mutual inductance partial discharge detection device for a cable joint according to the present invention, such as the capacitive partial discharge acquisition sensor shown in fig. 1.
Fig. 3 is a schematic cross-sectional view illustrating the installation of the capacitive partial discharge acquisition sensor in the resonant mutual inductance partial discharge detection device for a cable joint according to the embodiment of the present invention shown in fig. 2.
Fig. 4 is an exploded view of a preferred embodiment of the resonant mutual inductance partial discharge detection device for a cable joint according to the present invention, such as the partial discharge signal resonance output unit shown in fig. 1.
Fig. 5 is an exploded view of a preferred embodiment of the resonant mutual inductance partial discharge detection device for a cable joint according to the present invention, such as the partial discharge signal resonance acquisition unit shown in fig. 1.
Fig. 6 is a schematic diagram of a preferred embodiment of the coil layer in the partial discharge signal resonance output unit and the partial discharge signal resonance acquisition unit in the resonant mutual inductance partial discharge detection device for a cable joint according to the present invention.
Fig. 7 is a schematic diagram showing that the magnetic line loop is restrained by the coils in the partial discharge signal resonance output unit and the partial discharge signal resonance acquisition unit in the resonant mutual inductance partial discharge detection device for the cable joint according to the utility model.
Fig. 8 is a schematic flow chart of a preferred embodiment of partial discharge detection using the resonant mutual inductance partial discharge detection device for a cable joint of the present invention.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention with reference to the following examples.
Example 1
As shown in fig. 1, a detection device is put in mutual inductance office of cable joint resonant mode, including capacitanc office put collection sensor 1, office put signal resonance output unit 2, office put signal resonance collection unit 3 and office put signal processor 4, capacitanc office put collection sensor 1 with office put signal resonance output unit 2 wired connection and install in the withstand voltage in-layer of cable joint sheath, signal resonance output unit 2 is put in office and signal resonance collection unit 3 wireless connection is put in office, signal resonance collection unit 3 is put in office and signal processor 4 wired connection is put in office and install in the withstand voltage of cable joint sheath is outside.
As shown in fig. 2 and 3, the capacitive partial discharge acquisition sensor 1 is made of a flexible pcb (fpc) and has a mesh-shaped capacitance detection area made of a conductive material copper. The capacitive partial discharge acquisition sensor 1 is arranged outside the cable joint rubber layer 32 and inside the copper mesh layer 33, and the rubber layer 32 wraps the cable guide core 31. The flexible PCB for manufacturing the capacitive partial discharge acquisition sensor is of a double-layer structure, wherein the cable rubber layer 32 is of a mesh structure made of copper wires and provided with four mesh capacitance detection areas 121, 122, 123 and 124, and the cable copper wire mesh layer 33 is of a whole one-piece structure 11 made of copper sheets. The mesh-shaped capacitance detection area in the capacitance type partial discharge acquisition sensor adopts an array structure and forms an angle difference in a distributed layout to wrap the cable joint. Two mesh capacitance detection regions are grouped in opposite positions, that is, mesh capacitance detection regions 121 and 123 are grouped, and 122 and 124 are grouped. The capacitance type partial discharge acquisition sensor 1 is close to the cable copper mesh layer 33 and adopts a copper sheet integral one-piece structure 11, so that the copper mesh layer of the cable joint can not influence the capacitance area, and the capacitance value can not be influenced; it adopts network structure near cable rubber layer 32, can guarantee that the electric capacity has less capacitance value when having great cable joint parcel area, when having less partial discharge, according to electric charge quantity Q = C V, can have a voltage value that is relatively great easily detected. The capacitance type partial discharge acquisition sensor 1 is made of a flexible double-layer PCB (flexible printed circuit board) (FPC), the distance between two layers of the capacitor can be strictly controlled, and the capacitance value deviation caused by installation is avoided, so that the measurement result is not influenced.
As shown in fig. 4, the partial discharge signal resonance output unit 2 includes a case 21, a coil layer 22, and an electromagnetic shield layer 23, and the electromagnetic shield layer 23 and the coil layer 22 are installed in the case 21. Coil layer 22 adopts array structure to arrange on PCB for inductance coil, and a certain cable joint department inductance coil's group number and this department installation in the signal resonance output unit 2 are put in the capacitanc office the piece number of gathering sensor 1 interior electric capacity is put to the capacitanc office, and the figure of netted electric capacity detection zone is unanimous promptly, inductance coil adopts the twin coil structure, adopts reverse coiling's mode, and each group inductance coil is connected with a netted electric capacity detection zone, forms resonant circuit. The electromagnetic shielding layer 23 is made of ferrite material. Partial discharge signal resonance output unit 2 adopts integrative injection structure, and its shell 21 possesses IP68 waterproof construction be provided with outlet 24 on the shell 21, the coil layer with the connecting wire in electric capacity detection zone by outlet 24 draws forth outlet 24 department still is provided with the rubber plunger, is used for waterproof. The partial discharge signal resonance output unit 2 is arranged at a glue pouring port of a copper cable shell in the cable joint heat shrinkable tube and used for transmitting a partial discharge signal to the outside of a pressure-resistant layer of a cable outer sheath.
As shown in fig. 5, the partial discharge signal resonance acquisition unit 3 includes a housing 31, a coil layer 32, and an electromagnetic shielding layer 33, and the electromagnetic shielding layer 33 and the coil layer 32 are installed in the housing 31. Coil layer 32 adopts array structure to arrange on PCB for inductance coil, and a certain cable joint department inductance coil's group number and this department installation in the signal resonance acquisition unit 3 are put to the capacitanc office the piece number of gathering sensor 1 interior electric capacity is put to the capacitanc office, and the figure of netted electric capacity detection zone is unanimous promptly, inductance coil adopts the twin coil structure, adopts reverse coiling's mode, each group inductance coil with electric capacity phase-match receives the signal of inductance coil transmission in the signal resonance output unit 2 is put to the office. The electromagnetic shielding layer 33 is made of ferrite material. The partial discharge signal resonance acquisition unit 3 is of an integral injection molding structure, the shell 31 of the partial discharge signal resonance acquisition unit is provided with an IP68 waterproof structure, a wire outlet 34 is formed in the shell 31, a connecting wire of the coil layer and the partial discharge signal processor is led out from the wire outlet 34, and a rubber plunger 35 is further arranged at the wire outlet 34 and used for preventing water. Partial discharge signal resonance acquisition unit 3 install in outside the withstand voltage layer of cable oversheath to correspond with partial discharge signal resonance output unit position, its inductance coils with the electric capacity phase-match, through inductance coils with inductance coils in the partial discharge signal resonance output unit 2 is mutual inductance, receives the signal of partial discharge signal resonance output unit 2 transmission.
As shown in fig. 6, the coil layers of the partial discharge signal resonance output unit 2 and the partial discharge signal resonance acquisition unit 3 each include four sets of inductance coils, namely, an inductance coil 621, an inductance coil 622, an inductance coil 623, and an inductance coil 624, and the inductance coils are arranged on the PCB 61 in an array structure. Connecting wires are led out from two ends of the inductance coil, a connecting end 63 is formed at one end of the PCB 61, the connecting end 63 is provided with 8 connecting end points, wherein the uppermost two connecting end points correspond to two ends of the inductance coil 621, and every two connecting end points downwards correspond to two ends of the inductance coils 622, 623 and 624 respectively. The inductance coil adopts a double-coil structure and adopts a reverse winding mode to restrain a magnetic line loop. For the coil layer in the partial discharge signal resonance output unit 2, the inductance coil 621 is connected through the connecting end 63 to the two sides of the capacitance in the capacitance detection area 121, the inductance coil 622 is connected through the connecting end 63 to the two sides of the capacitance in the capacitance detection area 122, the inductance coil 623 is connected through the connecting end 63 to the two sides of the capacitance in the capacitance detection area 123, the inductance coil 624 is connected through the connecting end 63 to the two sides of the capacitance in the capacitance detection area 124, and each group of inductance coils forms a resonance circuit after being connected with the capacitance. For the coil layer in the partial discharge signal resonance acquisition unit 3, the coil layer is connected with the partial discharge signal processor 4 through the connecting end 63, and transmits signals to the partial discharge signal processor 4.
The principle that the inductance coil constrains the magnetic line loop is shown in fig. 7, and the magnetic line 73 passes through one coil of the inductance coil group 71 in the partial discharge signal resonance output unit 2, passes through the other coil of the inductance coil group 71, passes through one coil of the inductance coil group 72 in the partial discharge signal resonance acquisition unit 3, and then passes through the other coil of the inductance coil group 72 to form a closed loop, so as to constrain the magnetic line 73.
The partial discharge signal processor 4 comprises an FPGA and/or a single chip microcomputer, and is configured to receive the signal of the partial discharge signal resonance acquisition unit 3, process the signal by using fourier transform, and calculate the frequency domain signal strength by using methods such as Fast Fourier Transform (FFT) and/or Discrete Fourier Transform (DFT). Because the high-voltage cable has long line, large current and more high-frequency harmonic waves, when the cable works normally, the harmonic waves of the cable can cause interference to the capacitive partial discharge acquisition sensor 1, so that the effective partial discharge signal is submerged in the cable clutter, therefore, the partial discharge signal processor 4 processes the signal in a differential manner, namely, the signal difference of the group capacitors is calculated, on one hand, the interference signals of the cable can be uniformly absorbed by the mesh capacitor detection area wrapped by the cable, the signal values of the group capacitors are the same, no difference exists, the interference signals can be well filtered, on the other hand, for partial discharge signals, charges escape from the cable core to the cable copper network layer, a voltage difference is formed by charging on a small detection area of the capacitance sensor, and another capacitance detection area which is grouped with the capacitance detection area is not formed with voltage difference, so that signal difference exists, and the position of the occurrence of the partial discharge can be positioned by which capacitance detection area detects the voltage difference. The partial discharge signal processor 4 uploads the partial discharge occurrence position to the server. Meanwhile, the discharge intensity can be uploaded, and a worker can timely maintain the cable according to a detection result, so that the occurrence of cable faults is reduced.
Example 2
Use the utility model discloses a cable joint resonant mode is mutual inductive to be put detection device and is carried out the flow that the office put the detection as shown in figure 8, include:
step 81: installing the resonant mutual inductance partial discharge detection device of the cable joint;
step 82: the cable joint resonant mutual inductance partial discharge detection device detects partial discharge signals and positions partial discharge generation positions;
step 83: and the partial discharge signal processor uploads the partial discharge occurrence position to a server.
In step 81, the capacitive partial discharge acquisition sensor is arranged outside the cable joint rubber layer and inside the copper mesh layer; the partial discharge signal resonance output unit is arranged at a glue pouring port of the cable copper shell and used for transmitting a partial discharge signal to the outside of a pressure-resistant layer of a cable outer sheath; and the partial discharge signal resonance acquisition unit is arranged outside the pressure-resistant layer of the cable outer sheath and corresponds to the partial discharge signal resonance output unit in position. The capacitive partial discharge acquisition sensor is in wired connection with the partial discharge signal resonance output unit, the partial discharge signal resonance output unit is in wireless connection with the partial discharge signal acquisition unit, the partial discharge signal resonance acquisition unit is in wired connection with the partial discharge signal processor, and a connecting wire of the partial discharge signal resonance acquisition unit is an electromagnetic shielding signal wire.
The step 82 further comprises:
step 821: the capacitance type partial discharge acquisition sensor acquires partial discharge signals;
step 822: the partial discharge signal resonance output unit generates resonance with the capacitance type partial discharge acquisition sensor and transmits partial discharge signals to the outside of the voltage-resistant layer of the cable outer sheath;
step 823: the partial discharge signal resonance acquisition unit receives a signal output by the partial discharge signal resonance output unit to the outside of the pressure-resistant layer of the cable outer sheath;
step 824: the partial discharge signal processor processes the signals collected by the partial discharge signal resonance acquisition unit and positions the partial discharge occurrence position.
Example 3
The mesh structure of the capacitor in the capacitive partial discharge acquisition sensor comprises a polygonal mesh structure such as a triangular mesh structure, a square mesh structure, a rectangular mesh structure, a regular hexagonal mesh structure and the like, and/or a circular mesh structure, but is not limited to the polygonal mesh structure and the circular mesh structure, and can also be an irregular mesh structure or a combination of several mesh structures.
In order to process signals by the partial discharge signal processor through a difference method, the number of the reticular capacitance detection areas in the capacitance type partial discharge acquisition sensor is even blocks, in order to enable the partial discharge position to be more accurately positioned, the number of the reticular capacitance detection areas can be increased, and meanwhile, the number of the partial discharge signal resonance output unit and the number of the inductance coils in the partial discharge signal resonance acquisition unit are correspondingly increased.
It should be noted that the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the foregoing embodiments illustrate the present invention in detail, those skilled in the art will appreciate that: it is possible to modify the solutions described in the foregoing embodiments or to substitute some or all of the technical features thereof, without departing from the scope of the present invention.
Claims (19)
1. The utility model provides a detection device is put in resonant mutual inductance office of cable joint, puts acquisition sensor and office including the office and puts signal processor, its characterized in that: still put signal resonance output unit and partial discharge signal resonance collection unit including the office, the collection sensor is put in the office with signal resonance output unit wired connection is put in the office and install in the withstand voltage in situ of cable joint sheath, signal resonance output unit is put in the office and signal resonance collection unit wireless connection is put in the office, signal resonance collection unit is put in the office and signal processor wired connection is put in the office and install in outside the withstand voltage layer of cable joint sheath.
2. The cable joint resonant mutual inductance partial discharge detection device according to claim 1, characterized in that: the partial discharge signal resonance output unit and the partial discharge signal resonance acquisition unit comprise shells, electromagnetic shielding layers and coil layers, and the electromagnetic shielding layers and the coil layers are installed in the shells.
3. The cable joint resonant mutual inductance partial discharge detection device according to claim 2, characterized in that: the coil layer is an inductance coil and is arranged on the PCB in an array structure.
4. The cable joint resonant mutual inductance partial discharge detection device according to claim 3, characterized in that: the inductance coil adopts a double-coil structure and adopts a reverse winding mode.
5. The cable joint resonant mutual inductance partial discharge detection device according to claim 2, characterized in that: the partial discharge signal resonance output unit and the partial discharge signal resonance acquisition unit are of an integral injection molding structure, and the shell of the partial discharge signal resonance output unit is provided with an IP68 waterproof structure.
6. The cable joint resonant mutual inductance partial discharge detection device according to claim 5, characterized in that: the shell is provided with a wire outlet, and the wire outlet is provided with a rubber plunger.
7. The cable joint resonant mutual inductance partial discharge detection device according to claim 1, characterized in that: the partial discharge signal resonance output unit is arranged at a glue pouring port of a cable copper shell and used for transmitting a partial discharge signal to the outside of a pressure-resistant layer of a cable outer sheath.
8. The cable joint resonant mutual inductance partial discharge detection device according to claim 1, characterized in that: the partial discharge signal resonance acquisition unit is arranged outside the pressure-resistant layer of the cable outer sheath and corresponds to the partial discharge signal resonance output unit in position.
9. The cable joint resonant mutual inductance partial discharge detection device according to claim 4, characterized in that: the partial discharge acquisition sensor is a capacitance type partial discharge acquisition sensor and is made of a flexible PCB.
10. The cable joint resonant mutual inductance partial discharge detection device according to claim 9, characterized in that: the capacitive partial discharge acquisition sensor is provided with a mesh-shaped capacitance detection area.
11. The cable joint resonant mutual inductance partial discharge detection device according to claim 10, characterized in that: and an inductance coil in the partial discharge signal resonance output unit and a capacitor in the capacitive partial discharge acquisition sensor form a resonance circuit.
12. The cable joint resonant mutual inductance partial discharge detection device according to claim 11, characterized in that: and an inductance coil in the partial discharge signal resonance acquisition unit is matched with the capacitor, and the inductance coil is mutually inducted with an inductance coil in the partial discharge signal resonance output unit.
13. The cable joint resonant mutual inductance partial discharge detection device according to claim 10, characterized in that: the capacitance type partial discharge acquisition sensor is internally provided with a plurality of netted capacitance detection areas, and the netted capacitance detection areas are arranged in an array structure and form angle difference in a distributed layout mode to be wrapped outside a rubber layer of a cable joint and in a copper mesh layer.
14. The cable joint resonant mutual inductance partial discharge detection device according to claim 13, characterized in that: the flexible PCB for manufacturing the capacitive partial discharge acquisition sensor is of a double-layer structure, wherein the rubber layer close to the cable is of a net structure, and the copper net layer close to the cable is of an integral one-piece structure.
15. The cable joint resonant mutual inductance partial discharge detection device according to claim 13, characterized in that: the number of the netted capacitance detection areas in the capacitance type partial discharge acquisition sensor wrapping a certain cable joint is even, and two detection areas with opposite positions form a group.
16. The cable joint resonant mutual inductance partial discharge detection device according to claim 15, characterized in that: the number of groups of inductance coils in the partial discharge signal resonance output unit, the number of groups of inductance coils in the partial discharge signal resonance acquisition unit and the number of reticular capacitance detection areas in the capacitance type partial discharge acquisition sensor at a certain cable joint are consistent.
17. The cable joint resonant mutual inductance partial discharge detection device according to claim 10, characterized in that: the mesh structure adopted by the capacitor comprises a circular mesh structure and/or a polygonal mesh structure, but is not limited to the circular mesh structure and the polygonal mesh structure.
18. The cable joint resonant mutual inductance partial discharge detection device according to claim 1, characterized in that: the partial discharge signal processor comprises at least one of an FPGA and a singlechip.
19. The cable joint resonant mutual inductance partial discharge detection device according to claim 1, characterized in that: and the connecting line of the partial discharge signal resonance acquisition unit and the partial discharge signal processor is an electromagnetic shielding signal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920262736.4U CN210894569U (en) | 2019-03-01 | 2019-03-01 | Resonant mutual inductance partial discharge detection device for cable joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920262736.4U CN210894569U (en) | 2019-03-01 | 2019-03-01 | Resonant mutual inductance partial discharge detection device for cable joint |
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| CN210894569U true CN210894569U (en) | 2020-06-30 |
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| CN201920262736.4U Withdrawn - After Issue CN210894569U (en) | 2019-03-01 | 2019-03-01 | Resonant mutual inductance partial discharge detection device for cable joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752634A (en) * | 2019-03-01 | 2019-05-14 | 浙江新图维电子科技有限公司 | A kind of cable connector resonant mode mutual inductance partial discharge detection device and detection method |
-
2019
- 2019-03-01 CN CN201920262736.4U patent/CN210894569U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752634A (en) * | 2019-03-01 | 2019-05-14 | 浙江新图维电子科技有限公司 | A kind of cable connector resonant mode mutual inductance partial discharge detection device and detection method |
| CN109752634B (en) * | 2019-03-01 | 2024-02-27 | 浙江新图维电子科技有限公司 | Cable joint resonant mutual inductance partial discharge detection device and detection method |
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